空间数据类型

概述

MySQL具有对应于OpenGIS类的空间数据类型。DSC工具支持以下列出类型转换。

类型对照

• GEOMETRY可以存储任何类型的几何值。其他单值类型（POINT， LINESTRING和POLYGON）将其值限制为特定的几何类型。
• GEOMETRYCOLLECTION可以存储任何类型的对象的集合。其他集合类型（MULTIPOINT， MULTILINESTRING， MULTIPOLYGON，和 GEOMETRYCOLLECTION）限制集合成员像那些具有特定的几何形状的类型。

• 输入示例

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  CREATE TABLE `t_geo_test2` ( `id` int(11) NOT NULL, `name` varchar(255), `geometry_1` geometry NOT NULL, `point_1` point NOT NULL, `linestring_1` linestring NOT NULL, `polygon_1` polygon NOT NULL, `multipoint_1` multipoint NOT NULL, `multilinestring_1` multilinestring NOT NULL, `multipolygon_1` multipolygon NOT NULL, `geometrycollection_1` geometrycollection NOT NULL, PRIMARY KEY (`id`) USING BTREE ) ENGINE = InnoDB;

  输出示例

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  CREATE TABLE "public"."t_geo_test2" ( "id" INTEGER(11) NOT NULL, "name" VARCHAR(255), "geometry_1" GEOMETRY NOT NULL, "point_1" POINT NOT NULL, "linestring_1" POLYGON NOT NULL, "polygon_1" POLYGON NOT NULL, "multipoint_1" BOX NOT NULL, "multilinestring_1" BOX NOT NULL, "multipolygon_1" POLYGON NOT NULL, "geometrycollection_1" GEOMETRYCOLLECTION NOT NULL, PRIMARY KEY ("id") ) WITH ( ORIENTATION = ROW, COMPRESSION = NO ) NOCOMPRESS DISTRIBUTE BY HASH ("id");